Nebulae and How to Observe Them

More documents

Recommendations

Info

Northern Winter Nebulae 78 This image of Barnard’s Loop was taken by Richard Payne with a Pentax 6X7 camera and a 165 mm f/2.8 lens. Puppis Nebulosity NGC 2438 PLNNB PUP 07 41.8 -14 44 M 46 and NGC 2438 offer an opportunity to understand that we see the Universe in two dimensions, even though it is at least a three-dimensional reality. The planetary nebula NGC 2438 is at almost half the distance of the star cluster M 46. I know that the nebula looks like it is right on the NE boundary of the open cluster. It is an optical illusion. The planetary is about 2500 light years away and the cluster is over 4000 light years distant. The actual star that illuminates the nebula is 18th magnitude, but there is an 11th-magnitude star in the middle of this nebula. This is also just a chance alignment. Using the 10 inch f/5.1 with an 8.8mm eyepiece the nebula is bright, large and elongated 1.2X1 in a PA of 75 degrees. The bright middle star of this planetary is held steady about 50 percent of the time. The nebulosity is light green in color. Going to the 4.7mm eyepiece is a nice view of the annular nature of this planetary, even though the ring is not complete. The annulus is brighter on the south side.
This image of M 46 and NGC 2438 is by Chris Schur with a 12.5 inch f/5 Newtonian. Moving way up in aperture to a 25 inch f/5 with a 12mm eyepiece for 300X shows lots of detail in this little planetary. It is light green and three stars are seen within the nebula. Two of these stars are obvious; one star is more difficult. The glow of the nebula is annular and the central section is light grey. There are two layers of nebulosity that surround the central star. NGC 2467 CL+NB PUP 07 52.5 -26 26 The star cluster is very nice and would generate observers if it where alone, but there is some bright nebulosity associated with this cluster. The notes on this cluster say that it is within the Puppis OB1 association. Sixty years ago Bart Bok and several others were working on the problem of where the spiral arms are located within the Milky Way. They found many of these groupings of bright, bluewhite stars that they labeled “OB associations.” They used them to trace out the spiral arms in our Galaxy. What they mean to an observer is that one of these associations is going to contain a concentration of bright, blue-white stars in that area of the sky. Using the 4 inch with a 12mm eyepiece and the Deep Sky filter makes this an easy-to-see round nebula. It is pretty faint, pretty small, round and has three stars involved. Averted vision makes it grow. Without the filter it is just barely visible in the small scope. NGC 2467 in the 13 inch is a bright, pretty large and pretty rich cluster. I counted 31 stars at 100X on a 7/10 night. This cluster was easy in the 11X80 finder. The nebula was seen without the UHC filter to start, but adding the filter made the nebula much better. There is a bright, round spot of nebulosity on the southwest side of the cluster and several pretty bright streaks on the northeast sections. Covering my head with a dark cloth and using the UHC filter allowed me to see that the entire field of view was nebulous to some degree. To top it off, there are several dark lanes winding their way through this region. Take a look at this littleknown cluster and nebula. Northern Winter Nebulae 79
Page 2 and 3:
Astronomers’ Observing Guides
Page 4 and 5:
Steven Coe Phoenix, AZ 85022 Stevec
Page 6 and 7:
Contents Acknowledgments . . . . .
Page 8 and 9:
Sagittarius Nebulosity . . . . . .
Page 10 and 11:
Viewing the Sky 2 First is ease of
Page 12 and 13:
Viewing the Sky 4 My large telescop
Page 14 and 15:
Viewing the Sky 6 Those two telesco
Page 16 and 17:
Viewing the Sky 8 • Ghost images
Page 18 and 19:
Viewing the Sky 10 Along with eyepi
Page 20 and 21:
Viewing the Sky 12 Fredericksen, an
Page 22 and 23:
Becoming a Deep Sky Observer 14 Cha
Page 24 and 25:
Becoming a Deep Sky Observer 16 Jim
Page 26 and 27:
Becoming a Deep Sky Observer 18 era
Page 28 and 29:
Using a Computer 20 Chapter 3 Using
Page 30 and 31:
Using a Computer 22 Web Sites It is
Page 32 and 33:
A Fun Night Under the Stars 24 Afte
Page 34 and 35:
A Fun Night Under the Stars 26 As w
Page 36 and 37: Improving your Skills 28 the comple
Page 38 and 39: Improving your Skills 30 Knowing th
Page 40 and 41: Nebula Knowledge 32 Chapter 6 Nebul
Page 42 and 43: Nebula Knowledge 34 and a small, ho
Page 44 and 45: Nebula Knowledge 36 than iron deman
Page 46 and 47: Nebula Knowledge 38 that there are
Page 48 and 49: Nebula Knowledge 40 from the outer
Page 50 and 51: Northern Autumn Nebulae 42 Chapter
Page 52 and 53: Northern Autumn Nebulae 44 Here is
Page 54 and 55: Northern Autumn Nebulae 46 This ima
Page 56 and 57: Northern Autumn Nebulae 48 This ima
Page 58 and 59: Northern Autumn Nebulae 50 Image of
Page 60 and 61: Northern Autumn Nebulae 52 Grus Neb
Page 62 and 63: Northern Autumn Nebulae 54 This is
Page 64 and 65: Northern Autumn Nebulae 56 NGC 1624
Page 66 and 67: Northern Winter Nebulae 58 Chapter
Page 68 and 69: Northern Winter Nebulae 60 IC 2149
Page 70 and 71: Northern Winter Nebulae 62 This ima
Page 72 and 73: Northern Winter Nebulae 64 discover
Page 76 and 77: Northern Winter Nebulae 68 IC 443 S
Page 78 and 79: Northern Winter Nebulae 70 Monocero
Page 80 and 81: Northern Winter Nebulae 72 NGC 2261
Page 82 and 83: Northern Winter Nebulae 74 the sky
Page 90 and 91: Northern Winter Nebulae 82 M 45 CL+
Page 92 and 93: Northern Winter Nebulae 84 NGC 3132
Page 94 and 95: Northern Spring Nebulae 86 Chapter
Page 96 and 97: Northern Spring Nebulae 88 Using th
Page 98 and 99: Northern Spring Nebulae 90 tary neb
Page 100 and 101: Northern Spring Nebulae 92 they cou
Page 102 and 103: Northern Spring Nebulae 94 lished a
Page 104 and 105: Northern Spring Nebulae 96 This dar
Page 106 and 107: Northern Spring Nebulae 98 With A.J
Page 108 and 109: Northern Summer Nebulae 100 This im
Page 110 and 111: Northern Summer Nebulae 102 Ara Neb
Page 112 and 113: Northern Summer Nebulae 104 IC 1396
Page 114 and 115: Northern Summer Nebulae 106 Cygnus
Page 118 and 119: Northern Summer Nebulae 110 With th
Page 120 and 121: Northern Summer Nebulae 112 Ophiuch
Page 126 and 127: Northern Summer Nebulae 118 area is
Page 128 and 129: Northern Summer Nebulae 120 Vulpecu
Page 130 and 131: Nebulae are Just the Start 122 Chap
Page 132 and 133: 124 Appendix Object Other Type Con
Page 134 and 135: 126 Appendix Object Other Type Con
Page 136 and 137:
128 Appendix Object Other Type Con
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Index Abell 21 69 Abell 31 61 Abell
show all

Nebulae and How to Observe Them

Create successful ePaper yourself

Delete template?

Save as template?